Subject:
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RE: QuiteC IR interfacing to lego firmware IR
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Tue, 3 Feb 2004 20:13:37 GMT
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Reply-To:
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<rhempel@NOMORESPAMbmts.com>
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Viewed:
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3246 times
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> When I send a 0xf7 opcode with a message of 0x03 (using brickOS as a known
> good thing), it is supposed to send:
>
> 0x55,0xff,0x00,0xf7,0x08,0x03,0xfc,0xfa,0x05
>
> I assume that brickOS is behaving correctly.
>
> On the quiteC side I receive this:
>
> 0x5d,0xff,0x00,0x03,0xfc,0xfa,0x05
>
> Two mysteries:
>
> 1. How did the 0x55 header byte get garbled to 0x5d?
> 2. Where in the heck did the opcode bytes (0xf7,0x08) go?
>
> Any help with QuiteC IR would be greatly appreciated.
Not knowing EXACTLY what is going on with QuiteC, I can only offer
some suggestions....
The 0x55 to 0x5D might just be IR warmup goofiness. As far as I know, the
RCX really only looks for the FF 00
Not sure what happened to the F7 and 08, but are you sure BrickOS
is sending those bytes?
Can you use some other method (like NQC) to send raw bytes to the brick?
Another thing you might try if you have a serial tower is to send
out plain ASCII data and see if you can capture that with QuiteC.
Finally, if you download the pbForth source, you'll find a new serial
library in there under h8300/serial/asm
<http://www.hempeldesigngroup.com/lego/pbForth/gems/pbForth.zip>
Hope this helps...
Ralph
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Message is in Reply To:
 | | QuiteC IR interfacing to lego firmware IR
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| Hi, QuiteC's IR facilities are rudimentary. They send and receive single bytes. I need to be able to make it send and receive lego IR protocol messages for opcode 0xf7. I'm not having much luck. When I send a 0xf7 opcode with a message of 0x03 (...) (21 years ago, 3-Feb-04, to lugnet.robotics.rcx)
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